HARQ-ACK Feedback Multiplexing for Multi-Point Network Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback information transmission to multiple transmission points, leading to increased network load and computation complexity.
Innovation Solution
A method and device for a terminal to generate and transmit HARQ-ACK feedback information to multiple transmission points or beams by receiving configuration information from multiple physical downlink control channels (PDCCHs), utilizing downlink assignment index (DAI) information, and employing frequency or time division multiplexing of PDCCHs to optimize feedback generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK feedback information is transmitted to multiple transmission points using existing methods, then communication reliability is improved, but network load and computation complexity increase
Solution Approach 1:
The patent segments the HARQ-ACK feedback transmission by introducing separate uplink control information (UCI) payloads for different transmission points. Each transmission point receives dedicated feedback information through separate PUCCH or PUSCH resources, dividing the complex multi-point feedback into manageable segments that reduce overall computation complexity while maintaining reliability
Solution Approach 2:
The patent introduces downlink assignment index (DAI) information as an intermediary element that enables the terminal to efficiently identify and manage feedback for multiple transmission points. The DAI acts as a mediator that structures the feedback transmission, allowing the terminal to systematically handle multiple PDCCHs and corresponding HARQ-ACK information without excessive computation
2Reliability
If HARQ-ACK feedback information is transmitted to multiple transmission points using existing methods, then communication reliability is improved, but network load increases
Solution Approach 1:
The patent merges multiple HARQ-ACK feedback transmissions into unified uplink control information structures. By combining feedback for multiple transmission points into single PUCCH or PUSCH transmissions with properly structured UCI payloads, the system reduces the total quantity of feedback messages transmitted over the network while maintaining reliable communication across all transmission points
Solution Approach 2:
The patent creates universal feedback transmission mechanisms that can handle multiple transmission points through a single standardized process. The uplink control information structure serves multiple functions by simultaneously carrying HARQ-ACK feedback for different transmission points, reducing network load by eliminating the need for separate dedicated feedback channels for each point
3Productivity
If multiple PDCCHs are received for scheduling one PDSCH, then cooperative communication performance is improved, but feedback generation complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure uplink control information payload structures and downlink assignment index information before the actual data transmission. This preliminary setup enables the terminal to efficiently generate feedback for multiple PDCCHs without complex real-time processing, as the feedback structure and mapping relationships are predetermined
Solution Approach 2:
The patent utilizes parameter changes in the form of DAI values that dynamically indicate the number and identity of PDCCHs requiring feedback. By changing these parameters based on the actual scheduling situation, the system enables adaptive feedback generation that maintains high cooperative communication performance while managing complexity through standardized parameter-based control
Data Source
AI summary
The disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate. The disclosure may be applied to intelligence services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, etc.) on the basis of a 5G communication technology and an IoT-related technology. A method and a device for transmitting or receiving HARQ-ACK feedback information by a terminal in a wireless communication system are provided. The method and device include transmitting, for network cooperative communication (network coordination), HARQ-ACK feedback information to multiple transmission points, panels, or beams by a terminal.